KR20040106686A - Press die and press method thereof - Google Patents

Abstract

PURPOSE: To provide a press die for improving quality of products by preventing wrinkle, distortion and spring back and reducing manufacturing cost by preventing loss of steel sheet, and a press method using the press die to realize merits of both processes by conducting a forming operation by a mixed process of draw forming and form forming. CONSTITUTION: The press die comprises a die(21) installed at the upper side such that the die is liftable and lowerable to form a product by applying draw forming process and form forming process onto a steel sheet(25) at the same time; a pad(23) installed at the lower side of the die to form an upper die together with the die; a holder(27) which is installed at the lower side of the pad such that the holder is liftable and lowerable, and on which the steel sheet is rested; and a punch(29) installed at the lower side of the holder to form a lower die together with the holder.

Description

Press mold and press method using the same {PRESS DIE AND PRESS METHOD THEREOF}

The present invention relates to a press die and a press method using the same, and more particularly, to a press die and a press method using the same for forming a plate by a mixing operation of draw molding (form) and foam (form) molding.

As shown in FIG. 1, a press die using a draw molding method is composed of a die 1 forming an upper die, a holder 3 forming a lower die, and a punch 5.

The press die forms a product (not shown) while the punch 7 rises when the die 1 and the holder 3 hold the iron plate 5. In practice, the die 1 and the holder 3 are lowered while holding the iron plate 5 to form a product while passing through the punch 7. The direction of this product is formed in the embossed direction.

This draw molding method has the advantage of less wrinkles in each cylinder and cylinder, but has the disadvantage of causing cost loss and quality deterioration by generating a lot of material loss, warpage and deformation of the product by spring back.

In addition, as shown in Fig. 2, the press mold using the foam molding method is composed of a punch 11 for forming an upper mold, a pad 13 for forming a lower mold, and a die 15.

This press die method forms a product (not shown) as the punch 11 and the pad 13 descend toward the die 15 while holding the iron plate 17. The direction of this product is formed in the negative direction.

This foam molding method has the advantage of low loss of material while producing many wrinkles and degrading quality.

The present invention is to solve the above disadvantages, an object of the present invention is to provide a press mold to reduce the cost by preventing the loss of the iron plate to improve the quality of the product to prevent wrinkles, distortion and spring back. .

It is another object of the present invention to provide a press method using a press mold which realizes the advantages of both by forming a draw operation by mixing a draw molding method and a foam molding method.

1 is a perspective view of a press mold applying the draw molding method according to the prior art.

Figure 2 is a perspective view of a press die to apply the foam molding method according to the prior art.

3 is an inverted perspective view of a press die according to the present invention.

* Description of the symbols for the main parts of the drawings *

21: die 23: pad

25: iron plate 27: holder

29: Punch

The press mold of the present invention,

A die provided on an upper side of the steel plate so as to be liftable to apply a draw molding method and a foam molding method together to form a product;

A pad provided on a lower side of the die to form an upper mold together with the die;

A holder which is provided at a lower side of the pad and which is placed on an iron plate;

It is provided on the lower side of the holder and includes a punch to form a lower mold together with the holder.

It is preferable that the upper die and the pad form the lower mold part of the foam molding press die.

It is preferable that the lower mold holder and the punch form a lower mold part of a draw molding press die.

It is preferable that the upper die, the pad and the lower die holder form a part for holding the iron plate.

In addition, the press method using the press die of the present invention,

A holding step of holding an upper plate formed of a die and a pad toward the iron plate, and holding the iron plate placed in the holder together with the holder by lowering the upper die and pad;

In the holding state by the holding step includes the forming step of forming the iron plate into the product while the upper die is lowered and passing through the punch.

Advantages and advantages of the present invention will be apparent from the following detailed description based on the accompanying drawings.

3 is an inverted perspective view of a press die according to the present invention, showing a die 21, a pad 23, an iron plate 25, a holder 27 and a punch 29. Since these components are shown in an inverted state, the vertical direction notation described below will indicate the direction in the actual mold rather than the vertical direction in the drawings.

This press die is configured to mold the iron plate 25 into a product by a draw molding and a foam molding method.

The die 21 and the pad 23 form the upper mold of the mold, and the holder 27 and the punch 29 form the lower mold of the mold.

The die 21 is provided on the upper side so as to be able to move up and down to form the uppermost side of the upper die. The pad 23 forming the die 21 with the die 21 is provided on the lower side of the die 21 so as to be lifted and lowered.

As such, the die 21 and the pad 23 forming the upper mold form the lower mold part of the foam molding press mold as described in the prior art, so that the foam molding method can be applied to the press mold of the present embodiment.

Moreover, the holder 27 is provided so that the lower side of the pad 23 can be elevated, and forms a part of lower mold | type. The iron plate 25 is placed in the holder 27. The punch 29 forming this holder 27 and the lower die is provided below the holder 27.

Thus, the holder 27 and the punch 29 which form a lower mold form the lower mold part of the draw molding press mold as described in the prior art, so that the draw molding method can be applied to the press mold of this embodiment.

In addition, in the press die of the present embodiment, the three components of the upper die 21, the pad 23 and the lower holder 27 form a part for holding the iron plate 25.

The press method using the press mold configured as described above comprises the steps of forming the product by holding the iron plate 25 with the three components.

By the holding step, the die 21 and the pad 23 forming the upper die are lowered toward the iron plate 25, and by this lowering, the die 21 and the pad 23 are held together with the holder 27. 27 to hold the iron plate 25 is placed.

This upper mold forms the lower mold part of the foam molding press mold, and partially applies the foam molding method to the press mold of the present embodiment to reduce the loss of material.

In the forming step, the upper die is lowered in the holding state, and the forming of the iron plate 25 is completed as the product passes through the punch 29. At this time, the direction of the product will form an embossed direction.

This lower mold forms a lower mold part of the draw molding press mold and partially applies the draw molding method to the press mold of the present embodiment, thereby preventing wrinkles, warping and springback.

As described above, the present invention forms an upper die with a die and a pad, a lower die with a holder and a punch, and holds and forms a steel plate with the die and a pad and a holder. By applying, it is possible to take full advantage of both.

Claims (5)

A die provided on an upper side of the steel plate so as to be liftable to apply a draw molding method and a foam molding method together to form a product; A pad provided on a lower side of the die to form an upper mold together with the die; A holder which is provided at a lower side of the pad and which is placed on an iron plate; And a punch provided below the holder to form a lower mold together with the holder. The method according to claim 1, The upper die and the pad form a lower mold part of a foam molding press die. The method according to claim 1, The lower mold holder and the punch form a lower mold part of a draw molding press mold. The method according to claim 1, The die and pad of the upper die and the holder of the lower die forms a part for holding the iron plate. A holding step of holding an upper plate formed of a die and a pad toward the iron plate, and holding the iron plate placed in the holder together with the holder by lowering the upper die and pad; Pressing method using a press die comprising a forming step of forming an iron plate into a product while passing the punch by the upper die is lowered in the holding state by the holding step.